Alternate Of Scalar Function For Comma Sepated Selection
Aug 9, 2007
I have 2 Tables as below,
1) Purchase_Invoice
a. PurchaseInvoiceID
b. SupplierName
c. BillNo
d. BillDate
2) Purchase_Invoice_Items
a. PurchaseInvoiceItemID
b. PurhcaseInvoiceID (FK to Purchase_Invoice Table)
c. ItemName
d. Quantity
e. Rate
Now I want to select all the records of Purhcase_Invoice table exactly once with one column at last containing comma separated Item name of particular PurhcaseInvoiceID as below
PurchaseInvoiceID | SupplierName | BillNo | BillDate | Items (Comma Separated Items)
Currently I am using Scalar Function which takes PurchaseInvoiceID as Argument and Returns Comma Separated Itemnames€¦
It works well but when number of records are large than performance is very poor.
Is there another way of doing same thing? By Join or By some System Function?
Nilesh
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May 22, 2008
Hi all,
I AM USING ROW_NUMBER() FUNCTION IN MY QUREY IN SQL 2005 BUT IT IS GIVING ME PROBLEM IN SQL 2000.
SO CAN U TELL ME WHAT IS THE ALTERNATE WAY TO ACHIVE SAME RESULT.
MY QUREY IS:
select row_number() over (order by SalesYTD asc) as rownum, CountryRegionName, FirstName, LastName, SalesYTD, SalesLastYear from Sales.SalesPerson
CAN U TELL ME HOW CAN I REPLACE ROW_NUMBER() FUNCTION.
THANKS IN ADVANCE
-JOHN
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Mar 5, 2008
I want to add four fields of a table and place the toatal in a new field.Also I wanna have the average of the fields.
For e.g
I have created a marksheet having four subjects.Now I wanna add the subjects and find the average of the subjects and place them in two different fields in the same table along with the respective names in the table.Pls help.
Thanks in advance.
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Jun 24, 2015
I build a UDF scalar function like this:
CREATE FUNCTION VerificaAcessoPerfil
(
@codigo INT
)
RETURNS INT
[Code] ....
Curiously when i call my function the same one return always the same value, ex:
Select VerificaAcessoPerfil(2)
the return value is : 698 ??
but if i run the Select statment like this:
SELECT DISTINCT codigo,
(case codigo WHEN 1 THEN 695
WHEN 11 THEN 697 WHEN 2 THEN 211
WHEN 10 THEN 698 WHEN 13 THEN 696
WHEN 4 THEN 1 END)[codigo]
FROM pf (NOLOCK) INNER JOIN pfu (NOLOCK) ON pfu.pfstamp=pf.pfstamp
WHERE codigo IN (1,11,2,10,13,4)
ORDER BY 1 ASC
The value are:
1695
2211
41
10698
11697
13696
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Jul 20, 2005
Is it ill-advised to have columns whose values pull from scalar functionsusing other fields in the record as parameters? For example, if I havecreate table a(iID int primary key)create table b(iID int ,iDetail int,CONSTRAINT PK PRIMARY KEY(iID,iDetail),CONSTRAINT FK FOREIGN KEY (iID) REFERENCES a(iID))Let's say in table b I put price information for each detail and in table aI'd like to put a column that sums these prices for the children of eachrecord. Should I make a computed column that references a function usingiID as a parameter? Or would it be better to create a view for this kind ofpurpose?Regards,Tyler
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Jan 19, 2014
I have a scalar function, which calculates the similarity of two strings. I use the following query, to compare the entries of one table against the value 'Test' and return the entries, which have a value > 50:
;WITH cte1 AS (
SELECT b.FirstName,
(SELECT fn_similarity('Test', b.FirstName)) AS [Value],
b.LastName
FROM [AdventureWorks2012].[Person].[Person] b
)
SELECT *
FROM cte1
WHERE [Value] > 50.00
ORDER BY [Value] DESC
Now I want to use this query against the first 50 entries of the [Person] table, so that the resultset includes all the values of the first 50 persons and the entries, which are similar to them.
At the moment I use a WHILE-loop and write the five single resultsets in a temporary table. Is there another way / a better way, maybe via a join?
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Nov 28, 2007
Hi, I have the follow function:
CREATE FUNCTION [dbo].[ToTime]
(
@intHora int, --A valid hour
@intMin int -- A valid minute
)
RETURNS smalldatetime
AS
BEGIN
declare @strTime smalldatetime
declare @errorvar int
select @strTime=cast(convert(varchar,cast((cast(@intHora as varchar) +':'+ cast(@intMin as varchar)) as smalldatetime),108) as varchar)
return @strTime;
END
the function works perfect but when the parameter for the hour is a negative number (for example -1), or a number > 23
and the parameter for the minute is an negative number (-1) or a number > 59, the function produce an error.
I need handle this error converting the wrong value in 0, but i don't want to do this using "if statement". for example
if @intHora < 0 or @intHora >23
begin
set @intHora = 0
end
if @intMin <0 or @intMin>59
begin
set @intMin = 0
end
please, If someone know some sql function (try - catch doesn't work) to handle this kind of error or some good way to do it, please help me.
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Dec 1, 2014
I have troubles with this scalar-valued UDF:
I get the error:
Select statements included within a function cannot return data to a client.
Is this a proper way to include a CTE in a function?
USE [DB1]
GO
SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
GO
CREATE FUNCTION [dbo].[_Pink_FN_StartingDatePLGeographical](@StartingDate AS DATETIME) RETURNS NVARCHAR(20)
[code].....
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May 14, 2015
I've a scalar function which is killing my performance. I've been used the SQL profiler and also DMVs to catch execution information. I'd like to store the value received by this function and also the time that it happened, but I can't think in a way to do it.
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Jan 28, 2008
As an example, I have a scalar function called TRIM that takes a VARCHAR parameter, does a LTRIM(TRIM(VARCHAR)), and returns the result.
How can I call this function from java using JDBC? I have only had luck calling basic stored procedures, but I need to call functions as well.
Thanks, Ken
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Aug 3, 2006
SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
GO
CREATE FUNCTION DetailedView
AS
BEGIN
Declare @fieldname varchar(10)
Declare @stmt varchar(4000)
Declare Fields Cursor For Select Amounttype From Amounttypes
Set @stmt = 'Select pono, myid, billtype'
Open Fields
Fetch Next From Fields Into @fieldname
While @@Fetch_Status = 0 Begin
Set @stmt = @stmt + ', sum(amountfc * Case When amounttype = ''' + @fieldname + ''' Then 1 Else 0 End) As ' + @fieldname
Fetch Next From Fields Into @fieldname
End
Close Fields
Deallocate Fields
Set @stmt = @stmt + ' From multiplebillsviewall Group By pono, myId,billtype '
return Exec(@stmt)
END
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Jul 11, 2007
Hi,
I have an assembly that contains the following function:
Public Class Lookup
<SqlFunction()> _
Public Shared Function MyTest() As Integer
Return System.Data.SqlTypes.SqlInt64.Null
End Function
End Class
Then in SSMS:
CREATE ASSEMBLY IRS_MyTest
FROM '\machine empmyAssembly.dll'
GO
CREATE FUNCTION dbo.MyTest() RETURNS INT
AS EXTERNAL NAME IRS_MyTest.[MyClass].MyTest
GO
when I run:
SELECT dbo.MyTest()
the following is returned:
Msg 6522, Level 16, State 2, Line 1
A .NET Framework error occurred during execution of user defined routine or aggregate 'MyTest':
System.Data.SqlTypes.SqlNullValueException: Data is Null. This method or property cannot be called on Null values.
System.Data.SqlTypes.SqlNullValueException:
at System.Data.SqlTypes.SqlInt64.get_Value()
at System.Data.SqlTypes.SqlInt64.op_Explicit(SqlInt64 x)
at Informed.DCLG.IRS.SQL.IncidentTransform.Lookup.MyTest()
Can anyone please advise on how to return back a null value. Currently, my only other option is to return nothing (actually returns 0) and then wrap this up to convert the value to null - not ideal.
Thanks,
Jan.
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Mar 10, 2008
I wrote a Scalar UDF in SQL2005 that returns an integer. I want to be able to display this integer in a ASP.Net 2.0 web page. I typically use a DAL for all data so I added an ObjectDataSource as a Qeury that contains only the UDF. How do I easily display the value in a Label Control or?
I have tried to use a Repeater with a label, a Formview with a Label, all to no avail. Any suggestions?
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Jun 16, 2015
I have this code:
Declare @sql as varchar(4000)
declare @tbl as varchar(100)
declare @exists as bit
select @tbl = 'ACA_RSF'
select @sql = 'select count(*) from [member_score] where source_tbl = ''' + @tbl + ''''
print @sql
exec (@sql)
and it returns 18 million for a record count.I have this scalar returning function, which models the above, and it returns zero:
select dbo.fnGet_Rec_Count('ACA_RSF') as cnt
here is the code:
alter FUNCTION spGet_Rec_Count
(
@source_tbl varchar(100)
)
RETURNS bigint
AS
BEGIN
-- Declare the return variable here
DECLARE @count bigint
-- Add the T-SQL statements to compute the return value here
select @count = (select count(*) from [member_score] where source_tbl = ''' + @tbl + ''')
-- Return the result of the function
RETURN @count
END
GO
I get zero regardless of where @count is declared as in or bigint.
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May 18, 2007
Hi, I'm having trouble with this multi-statement table-valued function:
ALTER FUNCTION MakeArDetail
(
-- Add the parameters for the function here
@dateStart DATETIME,
@dateEnd DATETIME
)
RETURNS @arDetail TABLE
(
Insurer VARCHAR(50),
NABP INT DEFAULT 0,
Claim MONEY DEFAULT 0,
Payment MONEY DEFAULT 0,
NumRx CHAR(7),
PatientName VARCHAR(50),
Paid030 MONEY DEFAULT 0,
Paid3160 MONEY DEFAULT 0,
Paid6190 MONEY DEFAULT 0,
Paid91120 MONEY DEFAULT 0,
Paid121 MONEY DEFAULT 0
)
AS
BEGIN
DECLARE @arTemp TABLE
(
Insurer VARCHAR(50),
NABP INT DEFAULT 0,
Claim MONEY DEFAULT 0,
Payment MONEY DEFAULT 0,
NumRx CHAR(7),
PatientName VARCHAR(50),
Paid030 MONEY DEFAULT 0,
Paid3160 MONEY DEFAULT 0,
Paid6190 MONEY DEFAULT 0,
Paid91120 MONEY DEFAULT 0,
Paid121 MONEY DEFAULT 0
)
INSERT INTO @arTemp
SELECT DISTINCT Insurer,NABP,0,0,NumRx,Patient,0,0,0,0,0 FROM Pims;
UPDATE @arTemp SET Claim =
(SELECT SUM(Pims.AmtReq)
FROM Pims
WHERE Pims.Insurer = @arTemp.Insurer AND
Pims.NABP = @arTemp.NABP AND
Pims.NumRx = @arTemp.NumRx
);
INSERT INTO @arDetail SELECT * FROM @arTemp
RETURN
END
GO
I get
Msg 137, Level 15, State 2, Procedure MakeArDetail, Line 43
Must declare the scalar variable "@arTemp".
I don't understand why SQL thinks @arTemp is a scalar variable which has to be declared.
If I don't include the UPDATE command the thing works.
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Feb 1, 2006
Ok, I'm pretty knowledgable about T-SQL, but I've hit something that seems should work, but just doesn't...
I'm writing a stored procedure that needs to use the primary key fields of a table that is being passed to me so that I can generate what will most likely be a dynamically generated SQL statement and then execute it.
So the first thing I do, is I need to grab the primary key fields of the table. I'd rather not go down to the base system tables since we may (hopefully) upgrade this one SQL 2000 machine to 2005 fairly soon, so I poke around, and find sp_pkeys in the master table. Great. I pass in the table name, and sure enough, it comes back with a record set, 1 row per column. That's exactly what I need.
Umm... This is the part where I'm at a loss. The stored procedure outputs the resultset as a resultset (Not as an output param). Now I want to use that list in my stored procedure, thinking that if the base tables change, Microsoft will change the stored procedure accordingly, so even after a version upgrade my stuff SHOULD still work. But... How do I use the resultset from the stored procedure? You can't reference it like a table-valued function, nor can you 'capture' the resultset for use using the syntax like:
DECLARE @table table@table=EXEC sp_pkeys MyTable
That of course just returns you the RETURN_VALUE instead of the resultset it output. Ugh. Ok, so I finally decide to just bite the bullet, and I grab the code from sp_pkeys and make my own little function called fn_pkeys. Since I might also want to be able to 'force' the primary keys (Maybe the table doesn't really have one, but logically it does), I decide it'll pass back a comma-delimited varchar of columns that make up the primary key. Ok, I test it and it works great.
Now, I'm happily going along and building my routine, and realize, hey, I don't really want that in a comma-delimited varchar, I want to use it in one of my queries, and I have this nice little table-valued function I call split, that takes a comma-delimited varchar, and returns a table... So I preceed to try it out...
SELECT *FROM Split(fn_pkeys('MyTable'),DEFAULT)
Syntax Error. Ugh. Eventually, I even try:
SELECT *FROM Split(substring('abc,def',2,6),DEFAULT)
Syntax Error.
Hmm...What am I doing wrong here, or can't you use a scalar-valued function as a parameter into a table-valued function?
SELECT *FROM Split('bc,def',DEFAULT) works just fine.
So my questions are:
Is there any way to programmatically capture a resultset that is being output from a stored procedure for use in the stored procedure that called it?
Is there any way to pass a scalar-valued function as a parameter into a table-valued function?
Oh, this works as well as a work around, but I'm more interested in if there is a way without having to workaround:
DECLARE @tmp varchar(8000)
SET @tmp=(SELECT dbo.fn_pkeys('MyTable'))
SELECT *
FROM Split(@tmp,DEFAULT)
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May 28, 2015
I have a procedure that calls a SVF to convert an xmldocument. The ultimate purpose is to update the xml in a column in a multi-million row table. The xml is stored as varchar(MAX), it was supposed to carry any type of text, initially at least.
My question is: why is the xml-parsing performed inside the function much slower when i pass the xmldocument as type xml than when it is passed as varchar(MAX) and the CAST to xml is within the function? Does processing the xml input parameter in SlowFunction involve expensive crossing of some context border?
The two versions of the SVF (they return the rowcount in this simplified example):
CREATE FUNCTION [dbo].[FastFunction]
(
@inDetaljerText varchar(MAX)
)
RETURNS int
[Code] ....
The two versions of the SP
CREATE PROCEDURE [dbo].[FastProcedure]
AS
BEGIN
SET NOCOUNT ON;
select
dbo.FastFunction(al.Detaljer)
[Code] ....
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Mar 2, 2007
Hi There,
I need to call a function to calculate a value. This function accepts a varchar parameter and returns a boolean value. I need to call this function for each row in the dataflow task. I thought I would use an oledb command transformation and for some reason if I say..
'select functioname(?)' as the sqlcommand, it gives me an error message at the design time. In the input/output properties, I have mapped Param_0(external column) to an input column.
I get this erro.."syntax error, ermission violation or other non specific error". Can somebiody please suggest me what's wrong with this and how should I deal this.
Thanks a lot!!
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Jul 26, 2006
Dear all,
Basically I want to set chain up the rights so that the anonymous web user IUSR_ .. can execute the new .NET subs, functions etc in the assembly, just as the anonymous web user can execute Stored Procedures when granted. In this way, it should be possible to call the .NET assembly just as classic stored procedures from ASP/ASP.NET.
I have written a .NET function which I can successfully execute if I log on to the database as an administrator by sending this T-SQL query; it returns the result of a given string:
select dbo.CLRHTMLString('abc')
The scenario is now to try to grant access to this assembly for a different role (webuser), which the classic IUSR_MYSERVERNAME is a login of, so that I can call the .NET Assembly when I am authenticated as the anonymous web user (e.g. via ASP, etc.).
To test access, I created a login (webusertest) for a user (webusertest) in the same role (webuser) on the database. But when I use this login, which supposedly has the same rights as the IUSR_, execution right is denied:
EXECUTE permission denied on object 'CLRHTMLString', database 'adt_db', schema 'dbo'.
Note: The 'webuser' database role has Execute permission on the Assembly.
I have also tested this from my actual web page, with the following results:
(1) IUSR_MYSERVER member of db_owner role: Web page has right to call assembly.
(2) IUSR_MYSERVER not member of db_owner role: Web page does not have right to call assembly.
Further test results:
(3) Function can be called when making the user "webusertest" member of the "db_owner" role, which is too much rights to grant for the anonymous web user.
(4) When adding the user 'webusertest' to get 'Execute' permissions on the assembly, it does not get added. After clicking OK, there is no warning message, but when opening the Assembly Properties -> Permission dialog box the same time, the 'webusertest' user does not appear in the list.
Thankful for any advice on this matter.
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Oct 21, 2012
I have a stored procedure that is passed two values. Both are strings representations of GUID values, the first is a single value, the second is a comma delimited string of values.In the stored procedure I call a split function to separate the comma delimited values into a table and this is used in my WHERE clause to filter my select results.This is an example:
Code:
SELECT
item.uiGUID as ItemGUID,
stores.strStoreName as Store,
location.strLocationName as Location
FROM tblItems as item
INNER JOIN tblStoreLocations as location
ON item.uiLocationGUID = location.uiGUID
INNER JOIN tblStores as stores
ON location.uiStoreGUID = stores.uiGUID
WHERE CAST(item.uiGUID as varchar(36)) IN (SELECT Value FROM dbo.Split(',',@ItemGUIDList))
When I run this query in the management studio, passing a list of 5 values in the second parameter, my results include one item for each of the 5 values. However, when I pass the parameters from my ASP project, (I've verified the values I think are being passed are indeed being passed), I only get one item.I believe the error is in my split function. Both split functions return the same results in the SQL management studio, but only one returns the correct results in the the ASP project.
When I use this version of the function it returns the correct table values to the calling application, but it chokes when the item list does not have a trailing comma. I figure that to be a bug in the SQL function.
Code:
CREATE FUNCTION [dbo].[Split]
( @Delimiter varchar(5),
@List varchar(8000)
)
RETURNS @TableOfValues table
( RowID smallint IDENTITY(1,1),
[Value] varchar(50)
[code]....
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Jul 20, 2005
Hi,I'm sure this is a common problem.. to create a single field from awhole column, where each row would be separated by a comma.I can do this for a specified table, and column.. and I've created afunction using VBA to achieve a more dynamic (and very slow) solution..so I would like to implement it using a user defined function in sql server.The problems I'm facing are, that I can't use dynamic sql in afunction.. and I also can't use temporary tables which could build up a'standard' table from parameters given to then perform the function on.So, with these limitations, what other options do I have?Cheers,Chris
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Jan 15, 2001
Hi. Im new to SQL and I need to export a SQL table as a comma delimited text file which is straight forward. However two of the fields are integers and I need these to be right justified with zero's.
In Access I would use something like format(columnname, "00000000") to get it to work, but SQL Server doesn't like this.
How can I do this?
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May 12, 2015
I've to write a function to return a comma delimited values from a table columns
If a table has Tab1 ( Col1,Col2,Col3).
E.g. as below ( the columnName content I want to use as columns for my pivot table
CREATE FUNCTION [RPT].[GetListOfCol]
(
@vCat NVARCHAR(4000)
)
RETURNS @PList
AS
BEGIN
SELECT @PList += N', [' + [ColumnName] +']'
FROM [ETL].[TableDef]
WHERE [IsActive] = 1
AND [Category] = @vCat
RETURN;
END;
I want out put to be as below, I am getting this output from the select query independently by declaring @Plist variable and passing @vcat value, now I want it to be returned from a function when called from a select query output ,Colum1,column2,....
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Jul 16, 2015
I am need to create comma separated list in sql and I am using below query.
declare @ConcatenatedString NVARCHAR(MAX)
select @ConcatenatedString = COALESCE(@ConcatenatedString + ', ', '') + CAST(rslt.Number AS NVARCHAR)
from
(
select 1 Number
union
select 2 Number
union
select 3 Number
)rslt
select @ConcatenatedString
When I use the above code inside a function, i am not getting desired output.
create function GetConcatenatedValue
AS
(
declare @ConcatenatedString NVARCHAR(MAX)
select @ConcatenatedString = COALESCE(@ConcatenatedString + ', ', '') + CAST(rslt.Number AS NVARCHAR)
from
(
select 1 Number
union
select 2 Number
union
select 3 Number
)rslt
return @ConcatenatedString
)
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Apr 27, 2015
I have one sp which has param name as cordinatorname varchar(max)
In where condition of my sp i passed as
coordinator=(coordinatorname in (select ltrim(rtrim(value)) from dbo.fnSPLIT(@coordinatorname,',')))
But now my promblm is for @coordinatorname i have values as 'coorcinator1', 'coordinato2,inc'
So when my ssrs report taking these values as multiselect, comma seperated coordinator2,inc also has comma already.
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Nov 9, 2007
Using Flat File Connection Manager, I am specifying Text Qualifier = Double quotes{"}, and i have TXT file with one column for lastname and first name as "LN,FN", and settings are set to comma delimted, now the connectin manager is creating two different columns for LN and FN,
it was never a problem in DTS 2000.
any work around.
Thanks,
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Apr 10, 2006
I have a file which contains comma separated columns. One of columns contains names of companies. Sometimes the names of the companies have a comma as part of the name. For those, the value is surrounded by double-quotes.
But it seems that SSIS ignores the double quotes and ONLY looks for the column separator. This causes my value to be split in half.
Traditionally, I thought parsers that deal with this type of import do not automatically take the first comma following the double-quote as the column separator but instead look for the first comma following the ending quote. (i.e. Look at how Excel performs imports...)
I cannot set the column separator of the column to double-quote comma since only those values that HAVE a comma in them are qualified.
Any ideas?
Here is sample fie content to see what I mean:
342123, Jason, 12345
21, Kim,4567
32.43, John Paul, 1245
23, "Mr. T", 98764
12, "Peter, Paul, Mary", 09643
The last entry should be imported as 12 in the first column, "Peter, Paul, Mary" in the second column and 09643 in the third but instead ends up as 12 in the first, "Peter in second column and Paul, Mary", 09643 in the last.
(Oddly enough, if I remove the first column of numbers the import works like it is supposed.)
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Jan 29, 2008
Hi all!
This is my sql statment that works perfectly
select name,id,case when maths>=35 then 'pass' else 'fail' end as maths,
case when science>=35 then 'pass' else 'fail' end as science,
case when tamil>=35 then 'pass' else 'fail' end as tamil ,
case when english>=35 then 'pass' else 'fail' end as english,
case when social>=35 then 'pass' else 'fail' end as social
from student
I dont want to use case in my querey? Is there any way can i replace
case with something?
Thanks in advance!
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Jul 17, 2007
I want to get 100 rows from particular record and onward. in oracle i can use rownum and in mySql i have function limit ... i want to know what is the ms-sql alternate for it.
I want to get 100 rows onward to one particular data ... how can i ?
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Aug 6, 2007
I need to implement support for alternate names on the database I’m working on.
When a user looks up: “Antony Bigglesworth” the query would return both: Antony Bigglesworth as well as Tony Bigglesworth, would both exist.
Anyone has a best practice on this or has done this before?
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Sep 30, 2006
hi i have a view in oracle. in that i am using decode function.
same query i want to write it in sqlserver. what it is the alternate
to decode.
this is a cross tab query
SELECT code, SUM(DECODE(field1, 4, Present_Value, 0)) AS c1, SUM(DECODE(field1, 5, Present_Value, 0)) AS c2,
SUM(DECODE(field1, 6, Present_Value, 0)) AS c3,SUM(DECODE(field1, 9, Present_Value, 0)) AS c4
FROM (SELECT field1,Code, Present_Value FROM table1) DERIVEDTBL GROUP BY code
thanks
suji
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Aug 21, 2007
I've a question regarding SSRS 2005.
Is there an efficient scripting method to update the connection string for ALL reports that reside on a reporting/web server? "(automating the process, rather than having to change the data source for each individual report that resides on that server)".
All suggestions are highly appreciated .
Thanks,
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Jul 23, 2005
-- tested schema below ---- create tables --create table tbl_test(serialnumber char(12))gocreate table tbl_test2(serialnumber char(12),exportedflag int)go--insert data --insert into tbl_test2 values ('123456789010',0)insert into tbl_test2 values ('123456789011',0)insert into tbl_test2 values ('123456789012',0)insert into tbl_test2 values ('123456789013',0)insert into tbl_test2 values ('123456789014',0)insert into tbl_test2 values ('123456789015',0)insert into tbl_test2 values ('123456789016',0)insert into tbl_test2 values ('123456789017',0)insert into tbl_test2 values ('123456789018',0)insert into tbl_test2 values ('123456789019',0)insert into tbl_test values ('123456789011')insert into tbl_test values ('123456789012')insert into tbl_test values ('123456789013')insert into tbl_test values ('123456789014')insert into tbl_test values ('123456789015')-- query --Select serialnumber from tbl_test2where serialnumbernot in (select serialnumber from tbl_test) andexportedflag=0This query runs quite fast with only the data above but when bothtables get million plus rows, the query simply bogs down. Is there abetter way to write this query?
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